CMMG released its BANSHEE series of AR pistols and rifles three months ago, but they’re already expanding the line. Currently it’s offered in .22 LR, 9mm, .45 ACP, and 300 BLK (reviewed here). Now, as of a couple days ago, the BANSHEE is also chambered in the same 5.7x28mm round made popular by the FN Five-seveN […]